COUPLING OF OPERATORS' POSITIONS AT A TELEPHONE SWITCHBOARD,申请号CAD600115-传众专利搜索

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发明名称	COUPLING OF OPERATORS' POSITIONS AT A TELEPHONE SWITCHBOARD
摘要
申请公布号	CA600115(A)	申请公布日期	1960.06.21
申请号	CAD600115	申请日期
申请人	SIEMENS BROTHERS AND CO. LIMITED	发明人	BLOOMFIELD J. WARMAN
分类号		主分类号
代理机构		代理人
主权项
地址

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